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-rw-r--r--src/fftw3/dft/buffered.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/src/fftw3/dft/buffered.c b/src/fftw3/dft/buffered.c
deleted file mode 100644
index 763ebe3..0000000
--- a/src/fftw3/dft/buffered.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * Copyright (c) 2003 Matteo Frigo
- * Copyright (c) 2003 Massachusetts Institute of Technology
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-/* $Id: buffered.c,v 1.1 2008/10/17 06:11:08 scuri Exp $ */
-
-#include "dft.h"
-
-typedef struct {
- int nbuf;
- int maxbufsz;
- int skew_alignment;
- int skew;
- const char *nam;
-} bufadt;
-
-typedef struct {
- solver super;
- const bufadt *adt;
-} S;
-
-typedef struct {
- plan_dft super;
-
- plan *cld, *cldcpy, *cldrest;
- int n, vl, nbuf, bufdist;
- int ivs, ovs;
- int roffset, ioffset;
-
- const S *slv;
-} P;
-
-/* transform a vector input with the help of bufs */
-static void apply(const plan *ego_, R *ri, R *ii, R *ro, R *io)
-{
- const P *ego = (const P *) ego_;
- int nbuf = ego->nbuf;
- R *bufs = (R *)MALLOC(sizeof(R) * nbuf * ego->bufdist * 2, BUFFERS);
-
- plan_dft *cld = (plan_dft *) ego->cld;
- plan_dft *cldcpy = (plan_dft *) ego->cldcpy;
- plan_dft *cldrest;
- int i, vl = ego->vl;
- int ivs = ego->ivs, ovs = ego->ovs;
- int roffset = ego->roffset, ioffset = ego->ioffset;
-
- /* note unsigned i: the obvious statement
-
- for (i = 0; i <= vl - nbuf; i += nbuf)
-
- is wrong */
- for (i = nbuf; i <= vl; i += nbuf) {
- /* transform to bufs: */
- cld->apply((plan *) cld, ri, ii, bufs + roffset, bufs + ioffset);
- ri += ivs; ii += ivs;
-
- /* copy back */
- cldcpy->apply((plan *) cldcpy, bufs+roffset, bufs+ioffset, ro, io);
- ro += ovs; io += ovs;
- }
-
- /* Do the remaining transforms, if any: */
- cldrest = (plan_dft *) ego->cldrest;
- cldrest->apply((plan *) cldrest, ri, ii, ro, io);
-
- X(ifree)(bufs);
-}
-
-
-static void awake(plan *ego_, int flg)
-{
- P *ego = (P *) ego_;
-
- AWAKE(ego->cld, flg);
- AWAKE(ego->cldcpy, flg);
- AWAKE(ego->cldrest, flg);
-}
-
-static void destroy(plan *ego_)
-{
- P *ego = (P *) ego_;
- X(plan_destroy_internal)(ego->cldrest);
- X(plan_destroy_internal)(ego->cldcpy);
- X(plan_destroy_internal)(ego->cld);
-}
-
-static void print(const plan *ego_, printer *p)
-{
- const P *ego = (const P *) ego_;
- p->print(p, "(%s-%d%v/%d-%d%(%p%)%(%p%)%(%p%))",
- ego->slv->adt->nam,
- ego->n, ego->nbuf,
- ego->vl, ego->bufdist % ego->n,
- ego->cld, ego->cldcpy, ego->cldrest);
-}
-
-static int compute_nbuf(int n, int vl, const S *ego)
-{
- return X(compute_nbuf)(n, vl, ego->adt->nbuf, ego->adt->maxbufsz);
-}
-
-static int toobig(int n, const S *ego)
-{
- return (n > ego->adt->maxbufsz);
-}
-
-static int applicable0(const problem *p_, const S *ego, const planner *plnr)
-{
- if (DFTP(p_)) {
- const problem_dft *p = (const problem_dft *) p_;
- const iodim *d = p->sz->dims;
-
- if (1
- && p->vecsz->rnk <= 1
- && p->sz->rnk == 1
- ) {
-
- if (toobig(p->sz->dims[0].n, ego) && CONSERVE_MEMORYP(plnr))
- return 0;
-
- /*
- In principle, the buffered transforms might be useful
- when working out of place. However, in order to
- prevent infinite loops in the planner, we require
- that the output stride of the buffered transforms be
- greater than 2.
- */
- if (p->ri != p->ro)
- return (d[0].os > 2);
-
- /* We can always do a single transform in-place */
- if (p->vecsz->rnk == 0)
- return 1;
-
- /*
- * If the problem is in place, the input/output strides must
- * be the same or the whole thing must fit in the buffer.
- */
- return ((X(tensor_inplace_strides2)(p->sz, p->vecsz))
- || (compute_nbuf(d[0].n, p->vecsz->dims[0].n, ego)
- == p->vecsz->dims[0].n));
- }
- }
- return 0;
-}
-
-static int applicable(const problem *p_, const S *ego, const planner *plnr)
-{
- if (NO_BUFFERINGP(plnr)) return 0;
- if (!applicable0(p_, ego, plnr)) return 0;
-
- if (NO_UGLYP(plnr)) {
- const problem_dft *p = (const problem_dft *) p_;
- if (p->ri != p->ro) return 0;
- if (toobig(p->sz->dims[0].n, ego)) return 0;
- }
-
- return 1;
-}
-
-static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
-{
- const S *ego = (const S *) ego_;
- const bufadt *adt = ego->adt;
- P *pln;
- plan *cld = (plan *) 0;
- plan *cldcpy = (plan *) 0;
- plan *cldrest = (plan *) 0;
- const problem_dft *p = (const problem_dft *) p_;
- R *bufs = (R *) 0;
- int nbuf = 0, bufdist, n, vl;
- int ivs, ovs, roffset, ioffset;
-
- static const plan_adt padt = {
- X(dft_solve), awake, print, destroy
- };
-
- if (!applicable(p_, ego, plnr))
- goto nada;
-
- n = X(tensor_sz)(p->sz);
-
- X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs);
-
- nbuf = compute_nbuf(n, vl, ego);
- A(nbuf > 0);
-
- /*
- * Determine BUFDIST, the offset between successive array bufs.
- * bufdist = n + skew, where skew is chosen such that bufdist %
- * skew_alignment = skew.
- */
- if (vl == 1) {
- bufdist = n;
- } else {
- bufdist =
- n + ((adt->skew_alignment + adt->skew - n % adt->skew_alignment)
- % adt->skew_alignment);
- A(p->vecsz->rnk == 1);
- }
-
- /* attempt to keep real and imaginary part in the same order,
- so as to allow optimizations in the the copy plan */
- roffset = (p->ri - p->ii > 0) ? 1 : 0;
- ioffset = 1 - roffset;
-
- /* initial allocation for the purpose of planning */
- bufs = (R *) MALLOC(sizeof(R) * nbuf * bufdist * 2, BUFFERS);
-
- cld = X(mkplan_d)(plnr,
- X(mkproblem_dft_d)(
- X(mktensor_1d)(n, p->sz->dims[0].is, 2),
- X(mktensor_1d)(nbuf, ivs, bufdist * 2),
- TAINT(p->ri, ivs * nbuf),
- TAINT(p->ii, ivs * nbuf),
- bufs + roffset,
- bufs + ioffset));
- if (!cld)
- goto nada;
-
- /* copying back from the buffer is a rank-0 transform: */
- cldcpy = X(mkplan_d)(plnr,
- X(mkproblem_dft_d)(
- X(mktensor_0d)(),
- X(mktensor_2d)(nbuf, bufdist * 2, ovs,
- n, 2, p->sz->dims[0].os),
- bufs + roffset,
- bufs + ioffset,
- TAINT(p->ro, ovs * nbuf),
- TAINT(p->io, ovs * nbuf)));
- if (!cldcpy)
- goto nada;
-
- /* deallocate buffers, let apply() allocate them for real */
- X(ifree)(bufs);
- bufs = 0;
-
- /* plan the leftover transforms (cldrest): */
- {
- int id = ivs * (nbuf * (vl / nbuf));
- int od = ovs * (nbuf * (vl / nbuf));
- cldrest = X(mkplan_d)(plnr,
- X(mkproblem_dft_d)(
- X(tensor_copy)(p->sz),
- X(mktensor_1d)(vl % nbuf, ivs, ovs),
- p->ri+id, p->ii+id, p->ro+od, p->io+od));
- }
- if (!cldrest)
- goto nada;
-
- pln = MKPLAN_DFT(P, &padt, apply);
- pln->cld = cld;
- pln->cldcpy = cldcpy;
- pln->cldrest = cldrest;
- pln->slv = ego;
- pln->n = n;
- pln->vl = vl;
- pln->ivs = ivs * nbuf;
- pln->ovs = ovs * nbuf;
- pln->roffset = roffset;
- pln->ioffset = ioffset;
-
- pln->nbuf = nbuf;
- pln->bufdist = bufdist;
-
- {
- opcnt t;
- X(ops_add)(&cld->ops, &cldcpy->ops, &t);
- X(ops_madd)(vl / nbuf, &t, &cldrest->ops, &pln->super.super.ops);
- }
-
- return &(pln->super.super);
-
- nada:
- X(ifree0)(bufs);
- X(plan_destroy_internal)(cldrest);
- X(plan_destroy_internal)(cldcpy);
- X(plan_destroy_internal)(cld);
- return (plan *) 0;
-}
-
-static solver *mksolver(const bufadt *adt)
-{
- static const solver_adt sadt = { mkplan };
- S *slv = MKSOLVER(S, &sadt);
- slv->adt = adt;
- return &(slv->super);
-}
-
-
-void X(dft_buffered_register)(planner *p)
-{
- /* FIXME: what are good defaults? */
- static const bufadt adt = {
- /* nbuf */ 8,
- /* maxbufsz */ (65536 / sizeof(R)),
- /* skew_alignment */ 8,
-#if HAVE_SIMD /* 5 is odd and screws up the alignment. */
- /* skew */ 6,
-#else
- /* skew */ 5,
-#endif
- /* nam */ "dft-buffered"
- };
-
- REGISTER_SOLVER(p, mksolver(&adt));
-}
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